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Thermal Conductivity of Monolayer MoS2 Obtained from Temperature-Dependent Raman Spectroscopy

Published

Author(s)

Rusen Yan, Jeffrey R. Simpson, Simone Bertolazzi, Jacopo Brivio, Michael Watson, Xufei Wu, Andras Kis, Tengfei Luo, Angela R. Hight Walker, Huili G. Xing

Abstract

Atomically thin molybdenum disulphide (MoS2) is emerging as a potential alternative to graphene due to presence of bandgap, which is particularly advantageous to optoelectronic applications. The temperature-dependent Raman spectra of exfoliated monolayer MoS2 in the range of 100 K to 320 K are reported and analyzed. The linear temperature coefficients of the in-plane E2g1 and the out-of-plane A1g modes for suspended and substrate-supported monolayer MoS2 are measured and compared to those of relevant 2D materials such as graphene. These data, when combined with our first-order coefficients from laser power dependent studies enable the thermal conductivity to be extracted (24 ± 4) W/mK. This value is much lower than that seen in graphene, yet is in general agreement with our first-principle lattice dynamics simulations. This work demonstrates the continued relevance of Raman spectroscopy is to 2D nanoelectronic materials.
Citation
ACS Nano
Volume
8
Issue
1

Keywords

MoS2, thermal effects, thermal conductivity, phonon vibrations, Raman spectroscopy

Citation

Yan, R. , Simpson, J. , Bertolazzi, S. , Brivio, J. , Watson, M. , Wu, X. , Kis, A. , Luo, T. , Hight, A. and Xing, H. (2013), Thermal Conductivity of Monolayer MoS2 Obtained from Temperature-Dependent Raman Spectroscopy, ACS Nano, [online], https://doi.org/10.1021/nn405826k (Accessed February 21, 2024)
Created December 30, 2013, Updated November 10, 2018